New port: x11-fonts/vtfontcvt-ng

An improved version of vtfontcvt(8) with support for all font widths
and improved parsing of BDFs (FONT, FONTBOUNDINGBOX, BBX, etc.)
based on patches from https://bugs.freebsd.org/205707.

WWW: https://github.com/t6/vtfontcvt-ng

PR: 205707